Improvement in water-chills for puddling - furnace throats



THOMAS DAVIS AND WILLIAM ROBERTS OF SHARON, PENNSYLVANIA.

IMPROVEMENT IN WATER-CHILLS FOR PUDDLlNG-FURACE THROATS.4

Specification forming part of Letters Patent No. HS,513, dated J une 13, 1876; application filed November 11, 1875.

To all whom it may concern:

Beit known that we, THOMAS DAVIS and WILLIAM ROBERTS, of Sharon, in the county of Mercer, and State of Pennsylvania, have invented certain new and useful Improvements in Water-Ohills for Puddling-Furnaces; and we do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the aecompanyin g drawings, and to the letters of reference marked thereon, which form a part of this specification. Y Our invention relates to improvements in furnaces for puddling and heating iron, and other like purposes-more particularly to that part of the furnace technically known as the fore part,77 the part where the furnaceproper joins to the neck or entrance to the Hue.

Heretofore great difficulty has been experiencedv in the management ofthe draft of these furnaces, because of the gradual enlargement of the opening leading from the furnace to the flue, caused by the eating away of the brick-work at that point by the intense heat of the ignited gases which pass through it.

The object of our invention is to prevent this enlargement or change in the size of the opening, and thereby insure an even draft, or confine it to a fixed limit, which can be dependedon at all times. We accomplish this by protecting the brick-work which composes the roof and Walls of the furnace at this point by a hollow metallic lining or box supplied with a constantly-circulating current of cold water passing through it, to protect the metal of .the box. This water-box is built into the roof and walls of the furnace, and rests upon the top of the water liner or box which protects the flue-bridge, as seen in the accompanying drawings, in which- Figure l is a perspective view, showing the opening into the neck of the furnace, protected by our water box or liner. F ig. 2 is a sectional view of a puddling-furnace having our improvement. Fig. 3 is a vertical sectional view of the water-box.

Referring to the parts by letters, A represents the grate; B, the fire-bridge; C, the furnace; D, the flue-bridge, E, the neck, and F the flue or smoke-stack of av reverberatory or puddling furnace. G is the opening, the walls of which our device is designed to protect, it being the point of connection between the furnace with the neck. H is a hollow metallic water box or liner, built into the Walls of the furnace at this point, its base resting on the due-box D. The'inner sides of the box H are beveled, as clearly shown in Fig. l of the drawings, and the upper inner side h is inclined downward from front to rear, so as to correspond with the downward pitch or inclination given to the neck of the furnace.

In this way it will be seen that no angular portion of the box H is presented to the action of the flame or ignited gases passing through the opening Gr. The outer and rear sides of the box may be angular in form, as these parts are not exposed to the direct action of the flame as carried through the neck by the draft. I is a water-pipe cond ueted through the wall of the furnace and connected with the box H and I isa similar pipe connected with the upper sideof the box and leading through the roof of the furnace. These pipes connect with a suitable reservoir of cold Water; or a stream of cold water is made to pass inthrough the pipe I to the interior of the box H, and from thence out through the pipe I', a continuous flow of cold water being maintained through the box H in this way, the water protecting the metal of the box from the action of the dame or ignited gases passing through the openings E.

By means of this device the size of the opening into the neck of the furnace is maintained, and, being known, the draft of the furnace can be regulated, as required, with exactness and precision-a result which it is the object of our invention to accomplish.

The size ofthe water box or liner will ofcourse be varied to suit the requirementsA of the different furnaces to which it is applied, and the different fuels employed in such furnaces.

We are aware that water-liners have been used for protecting the boshes and other parts of furnaces, and do not, therefore, claim the principle or method of protecting the walls of a furnace by this means.

What we do claim as our invention, and desire to secure by Letters Patent, is-

A water-liner for paddling-furnace throats, In testimony that we claim the foregoing as consisting of the-hollow rectangular metallic our own, We affix our signatures in presence box H, provided with ingress and egress pipes of two witnesses. v'

I I', and arranged transversely to and inter- THOMAS DAVIS. nally encompassing the exit of the puddling- WM. ROBERTS. chamber, whereby the destructive widening Witnesses:

ofthe throat is prevented, substantially'as ABNER APPLEGATE,

and in the manner set forth. N. I. BRYDEN. 

